JPS6339775Y2 - - Google Patents
Info
- Publication number
- JPS6339775Y2 JPS6339775Y2 JP1983076511U JP7651183U JPS6339775Y2 JP S6339775 Y2 JPS6339775 Y2 JP S6339775Y2 JP 1983076511 U JP1983076511 U JP 1983076511U JP 7651183 U JP7651183 U JP 7651183U JP S6339775 Y2 JPS6339775 Y2 JP S6339775Y2
- Authority
- JP
- Japan
- Prior art keywords
- shift
- pair
- transmission
- interlocking
- side wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000005540 biological transmission Effects 0.000 claims description 49
- 230000002265 prevention Effects 0.000 claims description 5
- 230000007935 neutral effect Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
Landscapes
- Gear-Shifting Mechanisms (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、トラクタ等の走行車輌における変速
装置に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a transmission device for a traveling vehicle such as a tractor.
（従来の技術）
例えば農用トラクタの変速装置としては、実開
昭52−163689号公報に開示されたものがある。こ
の装置は、ミツシヨンケース内の変速軸上に一対
のシフタを配置し、各シフタを作動するシフトフ
オークを一対のシフトロツドで支持し、各シフト
ロツドにシフトフオークを作動する連動体を設
け、一対の連動体の対向部に、互いに嵌合してシ
フトロツド軸心廻りの回動を阻止する回動阻止手
段と、シフトレバーが択一的に係合してロツド軸
心方向に移動させる係合部とが形成されている。(Prior Art) For example, as a transmission device for an agricultural tractor, there is one disclosed in Japanese Utility Model Application Publication No. 52-163689. This device has a pair of shifters arranged on a transmission shaft inside a transmission case, a shift fork that operates each shifter is supported by a pair of shift rods, and an interlocking body that operates the shift fork is provided on each shift rod. Rotation prevention means that fit together with each other to prevent rotation of the shift rod about its axis are provided on opposing parts of the interlocking body; and an engaging part that selectively engages with the shift lever to move the rod in the axial direction. is formed.
（考案が解決しようとする課題）
ところで、農用トラクタのミツシヨンケースは
横幅が狭く形成されており、その内部に２〜３本
の変速軸を上下に並設しているのが一般的であ
り、前記従来の変速装置は、一対の連動体は左右
方向に並列され、シフトレバーをミツシヨンケー
スの上部に支持する構成であり、上位の変速軸用
に適用できるが、最下位の変速軸用には、上位の
変速軸が障害となつて適用し難く、シフトフオー
クを長く形成しなければならない。シフトフオー
クを長くするとこじれたりするので、変速操作が
円滑にできないことがある。(Problem to be solved by the invention) By the way, the transmission case of an agricultural tractor is formed with a narrow width, and two or three transmission shafts are generally arranged vertically in parallel inside the transmission case. In the conventional transmission device, the pair of interlocking bodies are arranged in parallel in the left and right direction, and the shift lever is supported at the upper part of the transmission case, and can be applied to the upper transmission shaft, but it is applicable to the lowermost transmission shaft. In this case, the upper shift shaft becomes an obstacle and is difficult to apply, and the shift fork must be made long. If the shift fork is made too long, it may become strained, making it difficult to shift gears smoothly.
本考案は、変速軸とミツシヨンケース側壁との
間に一対のシフトロツドを上下に並設し、この各
シフトロツドに設けた上下一対の連動体を、側壁
に略沿つて配置したシフトレバーで択一的に作動
させるように構成することによつて、下位の変速
軸でも、その側方にシフトロツドを配置し、短か
いシフトフオークで、ミツシヨンケースの上部か
ら変速操作を円滑にできるようにした変速装置を
提供することを目的とする。 In this invention, a pair of shift rods are arranged vertically in parallel between the transmission shaft and the side wall of the transmission case, and a pair of upper and lower interlocking bodies provided on each shift rod are selected by a shift lever arranged approximately along the side wall. By arranging the shift rod on the side of the lower gear shift shaft, the shift rod can be operated smoothly from the top of the transmission case using a short shift fork. The purpose is to provide equipment.
（課題を解決するための手段）
即ち、本考案における課題解決の具体的手段
は、ミツシヨンケース内の変速軸上に一対のシフ
タを配置し、各シフタを作動するシフトフオーク
を一対のシフトロツドで支持し、各シフトロツド
にシフトフオークを作動する連動体を設け、一対
の連動体の対向部に、互いに嵌合してシフトロツ
ド軸心廻りの回動を阻止する回動阻止手段と、シ
フトレバーが択一的に係合してロツド軸心方向に
移動させる係合部とが形成された変速装置におい
て、
前記一対のシフトロツドは変速軸とミツシヨン
ケース側壁との間で上下に並設され、下連動体の
係合部は上連動体の係合部の側方まで延設され、
シフトレバーは側壁に略沿つて配置されていて、
側壁に対して固定の支軸に、一対の係合部を選択
すべく軸方向移動自在に、且つ各係合部を移動す
べく回動自在に支持されていることである。(Means for Solving the Problem) That is, the specific means for solving the problem in the present invention is to arrange a pair of shifters on the transmission shaft in the transmission case, and to operate the shift fork for operating each shifter using a pair of shift rods. An interlocking body supporting the shift rod and operating a shift fork is provided on each shift rod, and a rotation preventing means that engages with each other to prevent rotation of the shift rod about its axis is provided at opposing portions of the pair of interlocking bodies, and a shift lever is provided. In the transmission device, the pair of shift rods are vertically arranged in parallel between the transmission shaft and the side wall of the transmission case, and the pair of shift rods are arranged vertically in parallel between the transmission shaft and the side wall of the transmission case. The engaging portion of the body extends to the side of the engaging portion of the upper interlocking body,
The shift lever is located roughly along the side wall,
It is supported by a support shaft fixed to the side wall so as to be movable in the axial direction to select one of the pair of engagement parts, and to be rotatable to move each engagement part.
（作用）
操作軸２５を介してシフトレバー２１を支軸２
０の軸心方向に移動すると、係合突起２３が上下
連動体１１，１２の係合部１５，１６に択一的に
係合する。一方の係合部に係合した状態で、操作
軸２５を介してシフトレバー２１を支軸２０の軸
心廻りに回動すると、選択された連動体がシフト
ロツドと一体にその軸心方向に移動し、シフトフ
オークを介して変速軸９上のシフタを摺動させ
る。(Function) The shift lever 21 is connected to the support shaft 2 via the operation shaft 25.
0, the engaging protrusion 23 selectively engages with the engaging portions 15 and 16 of the vertically interlocking bodies 11 and 12. When the shift lever 21 is rotated around the axis of the support shaft 20 via the operating shaft 25 while it is engaged with one of the engaging parts, the selected interlocking body moves in the direction of its axis together with the shift rod. Then, the shifter on the transmission shaft 9 is slid via the shift fork.
（実施例）
以下、本考案の実施例を図面に基いて説明す
る。(Example) Hereinafter, an example of the present invention will be described based on the drawings.
第１〜３図において、１はトラクタ車体を構成
するミツシヨンケースである。２は第１シフトロ
ツド、３は第２シフトロツドで、ミツシヨンケー
ス１内部の一側下部に、上下に並べて前後方向に
配置されており、この各シフトロツド２，３はミ
ツシヨンケース１内の隔壁に前後方向に摺動自在
に支持されている。 In FIGS. 1 to 3, reference numeral 1 indicates a transmission case that constitutes a tractor body. 2 is a first shift rod, and 3 is a second shift rod, which are arranged vertically in the lower part of one side inside the mission case 1 in the front-rear direction. It is supported so as to be slidable in the front and rear directions.
各シフトロツド２，３には、第１・第２シフト
フオーク４，５が夫々ボルト６，７により固設さ
れ、各シフトフオーク４，５は、ミツシヨンケー
ス１内のPTO変速装置８のPTO変速軸９上の第
１・第２シフタ１０に夫々係合している。前記
PTO変速軸９はミツシヨンケース１内の各種変
速軸の下位に位置している。前記シフトロツド
２，３はPTO変速軸９とミツシヨンケース１の
立面状の側壁との間に位置する。又、各シフトロ
ツド２，３におけるシフトフオーク４，５から軸
心方向に離れた対応する個所には、第１・第２連
動体１１，１２が夫々套嵌されて、内側方側から
螺挿されたボルト１３，１４により固定されてい
る。 First and second shift forks 4 and 5 are fixed to each shift rod 2 and 3 by bolts 6 and 7, respectively. They are engaged with first and second shifters 10 on the shaft 9, respectively. Said
The PTO transmission shaft 9 is located below the various transmission shafts in the transmission case 1. The shift rods 2 and 3 are located between the PTO transmission shaft 9 and the vertical side wall of the transmission case 1. In addition, first and second interlocking bodies 11 and 12 are respectively fitted into corresponding positions distant from the shift forks 4 and 5 in the axial direction of the shift rods 2 and 3, and are screwed in from the inner side. It is fixed by bolts 13 and 14.
各連動体１１，１２の外側部側には、相互に対
向する係合部１５，１６が内側方又は外側方に凹
設状に形成され、両係合部１５，１６の周辺部は
若干の間隙１７を介して対向している。即ち、係
合部１５は外側方へ凹状に形成され、係合部１６
は係合部１６の外側方で略同高さにまで延設され
て内側方へ凹状に形成されており、各係合部１
５，１６は上方に開放されている。 On the outer side of each interlocking body 11, 12, mutually opposing engaging parts 15, 16 are formed inwardly or outwardly in a concave shape, and the peripheral parts of both engaging parts 15, 16 are slightly They face each other with a gap 17 in between. That is, the engaging portion 15 is formed outwardly in a concave shape, and the engaging portion 16
extend to approximately the same height on the outer side of the engaging part 16 and are formed inwardly in a concave shape, and each engaging part 1
5 and 16 are open upwards.
又、第２連動体１２の上面側には、上方に開口
する嵌合溝１８が前後方向に形成され、これに対
応して、第１連動体１１の下面側には、嵌合溝１
８に前後方向に相対移動自在に係合して各連動体
１１，１２のシフトロツド軸心廻りの回動を阻止
する嵌合部１９が下方突出状に形成されている。
そして、前記嵌合溝１８と嵌合部１９とで回動阻
止手段が形成され、各連動体１１，１２の各変速
移動域内で、嵌合溝１８と嵌合部１９の嵌合状態
が維持せしめられる。 Further, a fitting groove 18 that opens upward is formed in the front-rear direction on the upper surface side of the second interlocking body 12, and correspondingly, a fitting groove 18 is formed on the lower surface side of the first interlocking body 11.
A fitting portion 19 is formed in a downwardly protruding shape and engages with the slider 8 so as to be relatively movable in the front-rear direction to prevent rotation of each of the interlocking bodies 11 and 12 about the shift rod axis.
The fitting groove 18 and the fitting part 19 form a rotation prevention means, and the fitted state of the fitting groove 18 and the fitting part 19 is maintained within each speed change movement range of each interlocking body 11, 12. I am forced to do it.
２０はミツシヨンケース１の側壁に螺着された
支軸で、その先端部はミツシヨンケース１内部に
突出して、両連動体１１，１２の上方側に位置す
る。２１はシフトレバーで、支軸２０に回動自在
に且つ軸心方向移動自在に套嵌されるボス部２２
と、ボス部２２から下設された係合突起２３と、
ボス部２２から後方に突設された係合筒２４とを
有し、係合突起２３先端部の円盤部は両係合部１
５，１６の一方に選択的に係合するが、PTO変
速装置８の中立時には、第１図に示すように、係
合突起２３の円盤部は両係合部１５，１６間の中
央に位置する。 Reference numeral 20 denotes a support shaft screwed onto the side wall of the mission case 1, the tip of which protrudes inside the mission case 1 and is located above both the interlocking bodies 11 and 12. Reference numeral 21 denotes a shift lever, and a boss portion 22 is fitted around the support shaft 20 so as to be rotatable and movable in the axial direction.
and an engaging protrusion 23 provided below from the boss portion 22;
It has an engaging cylinder 24 that projects rearward from the boss part 22, and the disc part at the tip of the engaging protrusion 23 is connected to both engaging parts 1.
5 and 16, but when the PTO transmission 8 is in neutral, the disk portion of the engagement protrusion 23 is located in the center between the two engagement portions 15 and 16, as shown in FIG. do.
２５はボス部２２の上方に位置する上下方向の
操作軸で、ミツシヨンケース１側に上下方向に摺
動自在で且つその軸心廻りに回動自在に備えら
れ、上端部にPTO変速レバーが固設されると共
に、下端部にボス２６を介してブラケツト２７が
固設されている。 Reference numeral 25 denotes a vertical operating shaft located above the boss portion 22, which is provided on the transmission case 1 side so as to be able to slide vertically and freely rotate around its axis, and has a PTO gear shift lever at its upper end. A bracket 27 is fixed to the lower end via a boss 26.
ブラケツト２７はボス２６から後方に突出する
Ｌ型状とされて、その下端部は係合筒２４後方に
位置し、該下端部に係合突起２８が前方に突設さ
れている。係合突起２８の前端部には、係合筒２
４に係合する球状部が備えられている。 The bracket 27 is L-shaped and projects rearward from the boss 26, and its lower end is located behind the engagement tube 24, and an engagement protrusion 28 is provided at the lower end to protrude forward. At the front end of the engagement protrusion 28, an engagement tube 2 is provided.
A spherical part is provided which engages with 4.
上記のように構成した実施例によれば、第１図
に示すPTO変速装置８の中立時からPTO変速装
置８の変速操作を行う場合には、まず、PTO変
速レバーにより操作軸２５を回動させる。する
と、ボス２６、ブラケツト２７、係合突起２８等
を介して、シフトレバー２１が支軸２０上を軸心
方向（横方向）に移動せしめられ、その係合突起
２３が両連動体１１，１２の係合部１５，１６の
一方に選択的に係合せしめられる。この状態で、
PTO変速レバーにより、操作軸２５を上下動す
れば、ボス２６、ブラケツト２７、係合突起２８
等を介して、シフトレバー２１が支軸２０廻りに
回動して、係合突起２３が前後方向に移動し、係
合している連動体をシフトロツド方向に移動し、
PTO変速装置８の変速操作が行われる。 According to the embodiment configured as described above, when performing a gear change operation of the PTO transmission 8 from the neutral state of the PTO transmission 8 shown in FIG. let Then, the shift lever 21 is moved in the axial direction (lateral direction) on the support shaft 20 via the boss 26, bracket 27, engagement protrusion 28, etc., and the engagement protrusion 23 engages both interlocking bodies 11, 12. is selectively engaged with one of the engaging portions 15 and 16 of. In this state,
By moving the operating shaft 25 up and down using the PTO gear shift lever, the boss 26, bracket 27, and engagement protrusion 28
etc., the shift lever 21 rotates around the support shaft 20, the engagement protrusion 23 moves in the front-rear direction, and the engaged interlocking body moves in the shift rod direction,
A speed change operation of the PTO transmission device 8 is performed.
即ち、今、例えば、シフトレバー２１が第１連
動体１１の係合部１５に係合しているとすれば、
シフトレバー２１の上記回動により、第３図の仮
想線で示すように、第１連動体１１が第１シフト
ロツド２及び第１シフトフオーク４と共にシフト
ロツド軸心方向に移動する。これにより、第１シ
フトフオーク４が第１シフター１０を前後方向に
摺動させ、PTO変速装置８は中立から低速又は
高速に切換わる。 That is, for example, if the shift lever 21 is currently engaged with the engaging portion 15 of the first interlocking body 11,
The rotation of the shift lever 21 causes the first interlocking body 11 to move in the axial direction of the shift rod together with the first shift rod 2 and the first shift fork 4, as shown by the imaginary line in FIG. As a result, the first shift fork 4 slides the first shifter 10 in the front-rear direction, and the PTO transmission 8 is switched from neutral to low speed or high speed.
ところで、上記実施例においては、第１連動体
１１の嵌合部１９を第２連動体１２の嵌合溝１８
に前後方向に相対移動自在に係合して、各連動体
１１，１２のシフトロツド軸心廻りの回動を阻止
しているので、各連動体１１，１２がシフトロツ
ド軸心廻りに回動して、両係合部１５，１６の周
辺部間の間隙１７が大となることはなく、従つ
て、上記間隙１７にシフトレバー２１の係合突起
２３が噛込んで、変速操作が行えなくなる惧れは
全くない。 By the way, in the above embodiment, the fitting part 19 of the first interlocking body 11 is connected to the fitting groove 18 of the second interlocking body 12.
Since the interlocking bodies 11 and 12 are engaged with each other so as to be relatively movable in the front-rear direction to prevent rotation of the interlocking bodies 11 and 12 about the shift rod axis, the interlocking bodies 11 and 12 are prevented from rotating about the shift rod axis. , the gap 17 between the peripheral parts of both the engaging parts 15 and 16 is not large, and therefore there is a risk that the engaging protrusion 23 of the shift lever 21 will get caught in the gap 17, making it impossible to perform the gear shifting operation. Not at all.
尚、回動阻止手段は、第４図に示すように、第
１連動体１１の下面と、第２連動体１２の上面と
を、シフトロツド軸心方向に相対移動自在に接当
乃至少隙を介して対向させて構成しても良い。 As shown in FIG. 4, the rotation prevention means allows the lower surface of the first interlocking body 11 and the upper surface of the second interlocking body 12 to come into contact or with a small gap so as to be relatively movable in the shift rod axial direction. They may also be configured to face each other via an intermediary.
（考案の効果）
以上詳述した本考案によれば、変速軸とミツシ
ヨンケース側壁との間に１対のシフトロツドを上
下に並設しているので、変速軸とミツシヨンケー
ス側壁との間が狭くとも、複数のシフトロツドを
配置することができ、シフトフオークも短かくで
き、各シフトロツド上の連動体は上下に配置され
ていても、下連動体の係合部を上連動体の係合部
の側方まで延設しているので、シフトレバーを上
方から係合することができ、組立てが容易にな
り、シフトレバーを側壁に略沿わせ且つ側壁に対
して固定の支軸に軸心方向移動自在に且つ回動自
在に支持しているので、シフトレバーをミツシヨ
ンケース内の他の構成部材と干渉することなく配
置できると共に、ミツシヨンケースの上部から操
作可能となり、上位の変速軸に妨害されることな
く、下位の変速軸用に適用することができる。(Effects of the invention) According to the invention described in detail above, since a pair of shift rods are vertically arranged in parallel between the transmission shaft and the transmission case side wall, there is a gap between the transmission shaft and the transmission case side wall. Even if the shift rod is narrow, multiple shift rods can be arranged, the shift fork can be shortened, and even if the interlocking bodies on each shift rod are arranged one above the other, the engagement part of the lower interlocking body can be connected to the engagement part of the upper interlocking body. Since the shift lever extends to the side of the section, the shift lever can be engaged from above, making assembly easy. Since it is supported so that it can move freely in both directions and rotate freely, the shift lever can be placed without interfering with other components inside the transmission case, and it can be operated from the top of the transmission case, allowing the shift lever to be attached to the upper transmission shaft. It can be applied to lower gear shift shafts without being interfered with.
第１図乃至第３図の本考案の実施例を示し、第
１図は正面断面図、第２図及び第３図の各図は第
１図のＡ−Ａ線、Ｂ−Ｂ線各矢視断面図、第４図
は回動阻止手段の他例を示す正面断面図である。
１……ミツシヨンケース、２，３……第１・第
２シフトロツド、４，５……第１・第２シフトフ
オーク、８……PTO変速装置、９……PTO変速
軸、１０……第１シフタ、１１，１２……第１・
第２連動体、１５，１６……係合部、１７……間
隙、１８……嵌合溝、１９……嵌合部、２１……
シフトレバー、２５……操作軸。
1 to 3 show an embodiment of the present invention, in which FIG. 1 is a front sectional view, and each of FIGS. 2 and 3 is a line AA and B-B in FIG. FIG. 4 is a front sectional view showing another example of the rotation prevention means. 1...Mission case, 2, 3...1st and 2nd shift rods, 4, 5...1st and 2nd shift forks, 8...PTO transmission, 9...PTO transmission shaft, 10...1st 1 shifter, 11, 12...1st shifter
Second interlocking body, 15, 16... Engaging portion, 17... Gap, 18... Fitting groove, 19... Fitting portion, 21...
Shift lever, 25...operation axis.
Claims (1)
を配置し、各シフタを作動するシフトフオークを
一対のシフトロツドで支持し、各シフトロツドに
シフトフオークを作動する連動体を設け、一対の
連動体の対向部に、互いに嵌合してシフトロツド
軸心廻りの回動を阻止する回動阻止手段と、シフ
トレバーが択一的に係合してロツド軸心方向に移
動させる係合部とが形成された変速装置におい
て、 前記一対のシフトロツドは変速軸とミツシヨン
ケース側壁との間で上下に並設され、下連動体の
係合部は上連動体の係合部の側方まで延設され、
シフトレバーは側壁に略沿つて配置されていて、
側壁に対して固定の支軸に、一対の係合部を選択
すべく軸方向移動自在に、且つ各係合部を移動す
べく回動自在に支持されていることを特徴とする
変速装置。[Claims for Utility Model Registration] A pair of shifters are arranged on a transmission shaft in a transmission case, a shift fork that operates each shifter is supported by a pair of shift rods, and each shift rod has an interlocking body that operates the shift fork. Rotation prevention means are provided in opposing portions of the pair of interlocking bodies to engage with each other to prevent rotation of the shift rod about its axis, and the shift lever selectively engages to move the rod in the axial direction. In the transmission device, the pair of shift rods are arranged vertically in parallel between the transmission shaft and the transmission case side wall, and the engaging part of the lower interlocking body is connected to the engaging part of the upper interlocking body. Extended to the side,
The shift lever is located roughly along the side wall,
A transmission characterized by being supported on a support shaft fixed to a side wall so as to be movable in an axial direction to select a pair of engaging parts and rotatably to move each engaging part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7651183U JPS59182734U (en) | 1983-05-20 | 1983-05-20 | transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7651183U JPS59182734U (en) | 1983-05-20 | 1983-05-20 | transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59182734U JPS59182734U (en) | 1984-12-05 |
| JPS6339775Y2 true JPS6339775Y2 (en) | 1988-10-19 |
Family
ID=30206555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7651183U Granted JPS59182734U (en) | 1983-05-20 | 1983-05-20 | transmission |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59182734U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5651632B2 (en) * | 1974-09-17 | 1981-12-07 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6123467Y2 (en) * | 1979-09-28 | 1986-07-14 |
-
1983
- 1983-05-20 JP JP7651183U patent/JPS59182734U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5651632B2 (en) * | 1974-09-17 | 1981-12-07 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59182734U (en) | 1984-12-05 |
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